Workmen on the lower portal of Tunnel #2

Chicago citation style
Department of the Interior. National Park Service. Scotts Bluffs National Monument. 1934-. Workmen on the lower portal of Tunnel #2. 1935. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/286025. (Accessed August 21, 2018.)
APA citation style
Department of the Interior. National Park Service. Scotts Bluffs National Monument. 1934-, (1935) Workmen on the lower portal of Tunnel #2. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/286025
MLA citation style
Department of the Interior. National Park Service. Scotts Bluffs National Monument. 1934-. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/286025>.
Note: These citations are programmatically generated and may be incomplete.